Thursday on TV

Survivor: Samoa (7 p.m., Ch. 2); Russell struggles to maintain control as the tribe turns on one of his allies.

Flash Forward (7 p.m., Ch. 4): Demetri and Mark travel to Utah in search of a suspect who might be connected to the global blackout.

National Parks: America's Best Idea (7 and 11 p.m., Ch. 7): Part 5 of 6. (Concludes Friday.)

Bones (7 p.m., Ch. 13): Human remains are found next to a railroad.

Vampire Diaries (7 p.m., Ch. 30): Stefan escorts Elana to a party.

Women's college soccer (7 p.m,. BYUTV): Oregon at BYU

Parks and Recreation (7:30 p.m., Ch. 5): Leslie is a judge in the Miss Pawnee Pageant.

Women's college volleyball (7:30 p.m., The mtn.): Utah at UNLV

CSI (8 p.m., Ch. 2): A porn producer and a drug dealer are killed in an upscale neighborhood.

Grey's Anatomy (8 p.m., Ch. 4): Everybody is trying to avoid being laid off.

The Office (8 p.m., Ch. 5): ; Dwight reaches his breaking point with Jim.

Fringe (8 p.m., Ch. 13): There's an explosion — but no bomb — inside a train station.

Supernatural (8 p.m., Ch. 30): Dean wakes up five years in the future and is attacked by humans infected with a demonic virus.

Project Runway (8 and 9:30 p.m., Lifetime): The sky's the limit in this episode.

Community (8:30 p.m., Ch. 5): Jim signs up for a class thinking it will be easy. It's not.

The Mentalist (9 p.m., Ch. 2): A state senator's intern is killed.

Private Practice (9:01 p.m., Ch. 4): Violet fights for her life and her baby is missing. (Season premiere)

It's Always Sunny in Philadelphia (11 p.m., FX): The gang struggles to keep the bar open.